| Identification | More | [Name]
4-(2-PYRIDYLAZO)RESORCINOL | [CAS]
1141-59-9 | [Synonyms]
4-(2'-PYRIDYLAZO)-RESORCINOL
4-(2-PYRIDYLAZO)RESORCINOL
PAR
TIMTEC-BB SBB008938
3-Benzenediol,4-(2-pyridinylazo)-1
4-(2-pyridinylazo)-3-benzenediol
4-(2-PYRIDYLAZO)RESORCINOL 98%
4-(2-PYRIDYLAZO)RESORCINOL, FOR THE DETE RMINATION OF HG
4-(2-PYRIDYLAZO)RESORCINOL FREE ACID
ParIndicatorGr
(2-PyridylAzo)Resorcinol
4-(2-Pyridilazo)resorcinol, 99%
4-(2-pyridylazo)resorcinol, acs
PAR,REAGENT,ACS
4-(2-PYRIDYLAZO)RESORCINOL (PAR) SPECTROPHOTOMETRIC REAGENT FOR TRANSITION METALS
P.A.R. Free Acid ACS
PAR [=4-(2-Pyridylazo)resorcinol] [Spectrophotometric reagent for transition metals]
PAR, Reagent
2-(2,4-Dihydroxyphenylazo)pyridine
4-(2-Pyridinylazo)benzene-1,3-diol | [EINECS(EC#)]
214-528-6 | [Molecular Formula]
C11H9N3O2 | [MDL Number]
MFCD00006256 | [Molecular Weight]
215.21 | [MOL File]
1141-59-9.mol |
| Chemical Properties | Back Directory | [Appearance]
ORANGE POWDER | [Melting point ]
192-202 °C(lit.)
| [Boiling point ]
355.48°C (rough estimate) | [density ]
1.2579 (rough estimate) | [refractive index ]
1.4930 (estimate) | [storage temp. ]
room temp | [solubility ]
DMSO (Slightly), Methanol (Slightly) | [form ]
Powder | [pka]
8.18±0.35(Predicted) | [color ]
Orange | [Water Solubility ]
Soluble in water (partly), and ethanol (slightly). Insoluble in ether, and low-polarity solvents. | [BRN ]
184665 | [CAS DataBase Reference]
1141-59-9(CAS DataBase Reference) | [EPA Substance Registry System]
1,3-Benzenediol, 4-(2-pyridinylazo)- (1141-59-9) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [RIDADR ]
2811 | [WGK Germany ]
3
| [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III | [HS Code ]
29333990 |
| Hazard Information | Back Directory | [Chemical Properties]
ORANGE POWDER | [Uses]
4-(2-Pyridylazo)resorcinol is used in studies of zinc release from Escherichia coli aspartate transcarbamoylase. It is used in cloud point extraction of copper, zinc, cadmium, and nickel in water samples. It is used in the chelate titration of aluminum, mercury, lead and nickel. It is employed as reagent in the colorimetric analysis of gold, cobalt, chromium, iron. | [General Description]
for synthesis | [Purification Methods]
Purify PAR as the sodium salt by recrystallisation from 1:1 EtOH/water. Purity can be checked by TLC using a silica gel plate and a mixed solvent (n-BuOH:EtOH:2M NH3; 6:2:2). [Beilstein 22 I 694, 22 III/IV 7074, 22/14 V 619.] |
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